A Novel SRR Metamaterial Inspired CPW-Fed Dual Band MIMO Antenna for Sub-6 GHz 5G Application

The metamaterial inspired novel CPW fed MIMO antenna design works based on the principle of non bianisotropic- split-ring resonator and amalgamation of hexagonal open ring resonator (Hex-ORR) thereby resulting in a miniaturized antenna with dimensions of 47.4 × 31.7 × 1.6 mm 3 . The two NB-SRR antennas are placed in opposite directions with an edge distance of 0.022 λ 0 . To eliminate the bianisotropic property of the split ring resonator which produces the effect of anisotropy and cross polarization. the NB-SRR is proposed in which the rings are aligned together from end to end of the metal strip, which helps in improvising the bandwidth to a higher frequency. This antenna holds decent for the Sub-6 GHz 5G application covering bandwidth of 983.5 MHz (3.7887–2.8052 GHz) and 551.6 MHz (6.3834–5.3818 GHz) with center frequency of 3 GHz and 6 GHz, respectively. The lower frequency band is produced using hex-ORR, and a higher frequency band is provided using NB-SRR. The size of the antenna is optimized by considering the Non Bianisotropic-SRR size minor than the resonant wavelength. The average isolation loss between the antenna elements is - 25 dB, the radiation gain is 5 dBi, and the efficiency is 97%. The proposed MIMO antenna parameters such as ECC, CCL, and TARC are also examined, and the results indicate that the proposed antenna design is a good candidate for Sub-6 GHz 5G applications.